Assuming you can get the early entry for Nintendo? That could make or break your day. I would really strongly suggest investing in that and making the most of that time, particularly the games, meet and greets, and a round or two on Mario Kart.
Basically, I'd do the following:
SUPER NINTENDO WORLD HOUR >
-Meet and Greets (they typically start at 7/7:15 if the park opens at 8)
-Games (save Bowser Jr. for a little later)
-Mario Kart
Then,
-Mummy
-Jurassic World
-Secret Life of Pets
-Studio Tour
After this point, the park will be busy, but you'll have gotten through most of the bottlenecks. Make a virtual queue reservation for Nintendo so you can go check it out again later and/or get a Toadstool Cafe reservation in the morning for dinner so you can reenter then. For lunch, I highly, highly recommend Vivo, which I believe to be superior to Orlando's offering. The liquor is top shelf and VERY affordable - Woodford Reserve is literally their well drink for bourbon. Excellent cocktails, pasta, and pizza, it's not too hard to get into, and it's very close to the turnstiles.
I would recommend picking up Waterworld and Kung Fu Panda in the afternoon, as they are typically pretty easy to access when the park is more crowded. You can safely skip Transformers, Simpsons, and Minions unless you are a completionist. Forbidden Journey may be worth doing for the differences in the Dementor sequence, and that ride tends to empty out by late afternoon. Flying Hippogriff also has more zip than its Orlando sister and offers incredible views of the San Fernando Valley.
You should also hang out on the top deck near the New York Street set, as that's where most of the characters emerge. You'll probably see Frankenstein's Monster and the Bride, for example.
I can't quite recall the exact dates, but if you're going on a Friday in April, I think you may also have a chance to see the Dark Arts show with drones and Death Eaters.